中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

8 records (took 0.02 seconds)

    Concentrated solutions of auramine dyes
    5.
    发明专利
    Concentrated solutions of auramine dyes 未知

    公开(公告)号：GB995954A

    公开(公告)日：1965-06-23

    申请号：GB4761763

    申请日：1963-12-03

    Applicant: BASF AG

    Inventor： SCHUBERT FRITZ ,  LUECKE EBERHARD

    IPC: C09B11/02 ,  C09B67/32 ,  C09B67/34 ,  C09B69/06 ,  D21H21/28

    Abstract: The invention comprises concentrated solutions containing 20% to 60% by weight of a salt of the auramine base of Auramine O or Auramine G with sulphuric acid or a water-soluble derivative thereof namely sulphamic acid, chlorosulphonic acid or a monoester of sulphuric acid such as monomethyl sulphate or monoethyl sulphate, in a possibly water-containing organic solvent which is miscible with water in all proportions, which is liquid at room temperature and which has a boiling point higher than 80 DEG C. Other water-miscible solvents which boil at less than 80 DEG C. may also be present. The invention also comprises a process for making auramine sulphates by treating an auramine base in an organic solvent with a water-soluble hydrogen sulphate or with sulphuric acid and a compound capable of forming a water-soluble hydrogen sulphate with sulphuric acid. The concentrated solutions mentioned above are made by dissolving an auramine sulphate in the water-miscible solvent or by reacting the sulphuric acid or acid derivative with the auramine base in the water-miscible solvent or in a non-polar solvent which is immiscible with the water-miscible solvent, then adding the water-miscible solvent to dissolve the product and separating the solvents.

    Stable highly concentrated solutions of basic dyes
    6.
    发明专利
    Stable highly concentrated solutions of basic dyes 未知

    公开(公告)号：GB981547A

    公开(公告)日：1965-01-27

    申请号：GB1185363

    申请日：1963-03-26

    Applicant: BASF AG

    Inventor： FINKENAUER HELMUT ,  SEIBERT WALTER ,  KOHL KARL ,  LUECKE EBERHARD ,  SCHUBERT FRITZ

    IPC: C09B11/02 ,  C09B67/34 ,  C09B69/06 ,  C09D11/00

    Abstract: Concentrated solutions of basic dyes comprise a salt of a basic dye with a water-soluble carboxylic acid and an anhydrous or water-containing solvent miscible in all proportions with water and selected from polyhydric alcohols and esters and ethers thereof, polyethers, amides, lactones, nitriles, dimethyl sulphoxide, tetrahydrofuran and dioxan. The dye solutions may be used to make non-drying inks by dilution with, e.g. ethylene glycol, for use in self-recording instruments, stamp-pads and typewriter ribbons. The dye solutions may contain excess, e.g. 1.5 to 2 times the stoichiometric equivalent, of water-soluble acid and may also contain water up to 50% by weight of the solvent. The solutions may contain 20-80% by weight of basic dye, the preferred dyes being from the diarylmethane, triarylmethane and diazapolymethine series. Specified acids are fromic, acetic, propionic, maleic and lactic acids. Numerous solvents are specified the preferred ones being ethylene glycol, diethylene glycol monoethyl ether, propylene glycol, dipropylene glycol, formamide and dimethylformamide. The preferred method of preparing the dye solutions comprises dissolving the carbinol base of the basic dye, which may still be water-wet, in a mixture of water-soluble acid and said solvent. Specifications 808,308 and 865,965 are referred to.ALSO:Concentrated solutions of basic dyes comprise a salt of a basic dye with a water-soluble carboxylic acid and an anhydrous or water-containing solvent miscible in all proportions with water and selected from polyhydric alcohols and esters and ethers thereof, polyethers, amides, lactones, nitriles, dimethyl sulphoxide, tetrahydrofuran and dioxan. The dye solutions may be employed to dye paper, leather and textiles including polyacrylonitrile fibres. The dye solutions may be used to make non-drying inks by dilution with, e.g. ethylene glycol, for use in self-recording instruments, stamp-pads and typewriter ribbons. The dye solutions may contain excess, e.g. 1.5 to 2 times the stoichiometric equivalent, of water-soluble acid and may also contain water up to 50% by weight of the solvent. The solutions may contain 20-80% by weight of basic dye, the preferred dyes being from the diarylmethane, triarylemethane and diazapolymethine series. Specified acids are formic, acetic, propionic, maleic and lactic acids. Numerous solvents are specified the preferred ones being ethylene glycol, diethylene glycol monoethyl ether, propylene glycol, dipropylene glycol, formamide and dimethylformamide. The preferred method of preparing the dye solutions comprises dissolving the carbinol base of the basic dye, which may still be water-wet, in a mixture of water-soluble acid and said solvent. Specifications 808,308 and 865,965 are referred to.

Patent Agency Ranking